<template>
  <!-- 全选反选练习 -->
  <div>
    <span>全选:</span>
    <input type="checkbox" v-model="selectAll" />
    <button @click="flip">反选</button>
    <ul>
      <li v-for="(item, index) in arr" :key="index">
        <input type="checkbox" v-model="item.checked" />
        <span>{{ item.name }}</span>
      </li>
    </ul>
  </div>
</template>

<script>
export default {
  data() {
    return {
      arr: [
        {
          name: "猪八戒",
          checked: false,
        },
        {
          name: "孙悟空",
          checked: false,
        },
        {
          name: "唐僧师傅",
          checked: false,
        },
        {
          name: "白龙马",
          checked: false,
        },
      ],
    };
  },
  methods: {
    flip() {
      this.arr.map((obj) => {
        obj["checked"] = !obj["checked"];
      });
    },
  },
  computed: {
    selectAll: {
      set(val) {
        this.arr.forEach((item) => (item.checked = val));
      },
      get() {
        return this.arr.every((item) => item.checked);
      },
    },
  },
};
</script>

<style></style>
